Victoria Police are broadening their investigation into alleged sexual abuse at St Patrick's College in Sale after receiving "many calls" relating to new complaints.

The complaints, which have emerged in the past week, were made by men who had been students between the ages of nine and 16 at the Catholic boarding school in the 1970s and 80s.

Previously, police focused their attention on one person, but have since received complaints against "a number of other former school employees".

An 87-year-old Sale man, who used to work at the school, was interviewed by police last week and released.

Detective Inspector Stephen Dennis said it had become apparent from the new complaints that the initial reports were not isolated.

"Callers from throughout Australia and overseas have been in contact with Sano Taskforce investigators in Melbourne and have indicated that other former school employees may be implicated in the sexual abuse of students," he said.